TMZ posted of Miley Cyrus' fiance Liam Hemsworth hitting another guy in the face during a street fight early Sunday morning in Philadelphia.

Liam had just left a bar when he confronted a guy he thought had thrown a rock at him and his friend.

Liam punched the guy in the face as the guy is hanging on to Liam's leg. 

Cops arrived but made no arrests. Liam took off with his friend.

Police say no one has filed a police report, yet.